/Engine/Source/Runtime/SlateCore/Public/Styling/SlateTypes.h
Represents the appearance of anSExpandableArea
struct FExpandableAreaStyle : public [FSlateWidgetStyle](API\Runtime\SlateCore\Styling\FSlateWidgetStyle)
FSlateBrush
CollapsedImage
Image to use when the area is collapsed
FSlateBrush
ExpandedImage
Image to use when the area is expanded
float
RolloutAnimationSeconds
How long the rollout animation lasts